摘要
采用非线性有限元方法对英国北爱尔兰Thompson桥中的BFRP筋增强自密实混凝土桥面板进行数值分析,通过对比数值模拟结果和试验结果表明所建立的有限元模型能够较准确地反映BFRP筋增强自密实混凝土桥面板在轮压负载下的工作性能。基于有限元模型的有效性,采用非线性数值模拟对该新型桥面板进行极限承载力和破坏模式进行预测及参数化分析。结果表明,BFRP筋自密实桥面板极限承载力大约为欧洲轮压负载150 k N的6倍(100 t),由于现行桥面板设计规范忽略了压缩薄膜效应的存在而导致桥面板极限承载力设计过于保守,参数化分析发现配筋率和筋材类型对桥面板极限承载力影响不大,而混凝土强度和跨高比是影响桥面板极限承载力的主要因素。
In this paper,the nonlinear finite element method is adopted to investigate the behavior of self-compacting concrete bridge deck slabs reinforced with basalt fibre reinforced polymer（BFRP） rebar in a real bridge named as Thompson＇s bridge in Northern Ireland. By comparing the results from the test and the finite element analysis,it is found that the proposed numerical model shows good agreement with the results from the field test. Based on the accurate validation with the test results,the loading-carrying capacity of self-compacting bridge decks reinforced with BFRP bars is predicted and a series of parametric study is conducted to evaluate the influence of some structural variables on loading carrying capacity of bridge deck slabs in Thompson＇ s Bridge. The numerical results indicate that the ultimate bearing capacity of the concrete deck slabs in Thompson Bridgeis about 1000 k N,which is about 6 times of European pressure load of 150 k N. However,the ultimate bearing capacity of bridge deck is highly underestimated by existing bridge deck design guidelines due to the ignorance of the existence of the compression membrane action. The results from parametric study show that the reinforcement ratio and the type of reinforcement have no significant effect on the ultimate bearing capacity of the bridge deck due to the influence of compressive membrane action. On the contrary,the concrete strength and the span to depth ratio have strong effect on the loading-carrying capacity of concrete bridge deck reinforced with BFRP bars.
作者
周玲珠
郑愚
Susan.E.Taylor
罗远彬
ZHOU Ling-zhu;ZHENG Yu;Susan. E. TAYLOR;LUO Yuan-bin(Donggnan University of Technology, Dongguan 523808, China;South China University of Technology, Guangzhou 510640, China;Queen＇s University of Belfast, Northern Ireland BT7 1NN, Britain;Harbin Institute of Teehnology （Shenzhen） , Shenzhen518055, China)
出处
《玻璃钢／复合材料》
CSCD
北大核心
2018年第5期12-18,共7页
Fiber Reinforced Plastics/Composites
基金
国家自然科学基金(51678149)
2015广东省普通高校国际暨港澳台合作创新平台及国际合作重大项目(自然科学)-特色创新项目(2015KTSCX141)
广东省科技计划-公益研究与能力建设方向(2016A010103045)
关键词
非线性有限元法
BFRP筋增强自密实桥面板
压缩薄膜效应
承载性能
nonlinear finite element method
BFRP reinforced self-compacting concrete bridge deck
compression membrane action
loading-carrying capacity
